Welcome to Peninsula Security

You have many options when it comes to your security, so why choose Peninsula Security?

We are a locally owned and operated company and have been serving the South Bay since 1984. Not only do we offer custom design and installation of state of the art security, camera and fire alarm systems, but you can expect courteous and friendly client care as well. We always have the needs of our clients at heart – your long-term satisfaction is our goal, and we take pride in our results.

We Specialize in:

  • Custom design and installation of state of the art security and fire alarm systems
  • Video surveillance & integrated home automation
  • Residential and commercial applications
Commercial and Residential Security
Residential security Services

Residential Services

  • Custom design and installation of state of the art security and fire systems
  • Service and monitoring of pre-existing alarm systems
  • Pre-wiring for most other low voltage systems for your new construction project
  • Integrated, remotely controlled home automation and video surveillance features powered by Alarm.com
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Commercial security Services

Commercial Services

  • Custom design and installation of state of the art security and fire systems
  • Service and monitoring of pre-existing alarm and fire systems
  • Integrated remote control automation features powered by Alarm.com providing control of critical systems at your business: Security, Employee/customer monitoring, and Energy Management
Learn More »

About Peninsula Security

Established in 1984 by Mark Rosenfeld, Peninsula Security has become one of the most trusted names for security in the South Bay.

Mark’s philosophy of “doing business the old-fashioned way” is apparent in all aspects of our business. We know our clients and care about their needs. We provide security, camera and fire systems using high quality, proven products that are custom designed to meet the unique needs and lifestyles of our clients. Our systems are installed and serviced by Peninsula Security technicians – never subcontractors, so that clients are ensured our high standards are maintained. While we adhere to an “old fashioned” way of doing business, our clients can also choose to incorporate the latest in home automation technology into their security systems. In addition, our clients can expect to receive courteous and friendly support services from administrative staff. Our clients’ long-term satisfaction is our goal, and the entire Peninsula Security family takes pride in our results.

Experience the difference with Peninsula Security.

Security Dealer in San Pedro

System Help

We are always available to help.

For Troubleshooting Assistance, please click here.

System Help »


We’ve had a number of gusty days recently, which can cause problems for our clients. Here are a few tips to prevent false alarms, and/or lots of unwanted beeping from your system: A mini glossary before we get started: Chime: a feature of many (but not all) systems, in which the system will beep two…


Existing Clients

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Automatic Debit

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Smart Home Solutions

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Interested in Alarm.com?

It’s an easy upgrade!

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Have Alarm.com?

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Our Affiliates

eDist Security
  • Thanks for all of your support with my alarm. Your tech was great and very supportive.

    Jim B., Huntington Beach
  • Mark has been especially helpful with our service, for which we are grateful!

    Ann S., Los Angeles
  • Matt and Andy were very professional, courteous, efficient and respectful. And knowledgeable! They did a great job and we are very appreciative.

    Ralph Z., Palm Desert
  • Always available, quickly responsive and excellent at assessing and correcting any issues!

    Jacqueline G., Palos Verdes Estates
  • Peninsula Security provides a benchmark level of service across the full spectrum from installation through maintenance. The result is a superb level of satisfaction on the customer’s part. Mark is also a terrific person.

    Errol B., San Pedro
  • Peninsula Security is the only alarm system company I would ever use- responsive service, quality work and a friendly, helpful staff. They provide peace of mind for me and my family at home and when we’re away.

    Michael D., Hermosa Beach
  • I have been very happy with the service when I have a problem and notify you – you promptly address the problem.

    Ann J., Torrance
  • You are an added layer of security when I exit my home for shopping or an extended vacation.

    Kathy F., Torrance
  • Excellent service as always!

    James Z., San Pedro
  • My son set the alarm and went to bed around 11pm. The alarm went off around 2am!! Someone had opened a door about an inch – enough to set off the alarm and scare away the intruder. He was so grateful for your security system!!

    Laura C., Palos Verdes Estates
  • Everyone is always helpful and friendly. I also appreciate your prompt service when I have needed something.

    Tammy M., San Pedro
  • You are one of the very best companies I have encountered in the last 50 years!

    Dan T. , Pasadena
  • You are prompt and polite. I love everyone at Peninsula Security. You make me feel more secure.

    Kiyo T. , Rancho Palos Verdes